Return is the most fundamental concept in investment. There are two methods to measure returns: Arithmetic return and … geometric return. The standard investment theory, Markowitz portfolio theory and CAPM, uses arithmetic return. Geometric return … provides more accurate and precise measurement of investment performance. Because of this, geometric return provides many …

Most investment decisions focus on a forecast of future events that is either explicit or implicit. Generally asset … by the variance of the asset price. The essence of this paper is to use GARCH in mean and EGARCH to examine the … relationship between mean returns on the Nigeria commercial banks portfolio investments and its conditional variance or standard …